Sheet film holder

Photography and optical equipment – Projector or viewer – Element or attachment

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Patent

active

D03615863

REFERENCES:
patent: D220597 (1971-04-01), Dawson et al.
patent: D240765 (1976-07-01), LeFevre et al.
patent: D302434 (1989-07-01), Cawthorne
patent: D350124 (1994-08-01), Nakaizumi
patent: 4186308 (1980-01-01), Erikson
patent: 4725865 (1988-02-01), Hoffman, Jr.
patent: 4821055 (1989-04-01), Loose et al.
patent: 4994835 (1991-02-01), Loose et al.

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